HTTP Status Code Reference
Quick reference for all HTTP status codes with descriptions and use cases.
Continue
The server has received the request headers, the client should proceed to send the request body.
Switching Protocols
The server is switching protocols as requested by the client via the Upgrade header.
Processing
The server has received and is processing the request, but no response is available yet.
Early Hints
Used to return some response headers before final HTTP message. Allows preloading resources.
OK
Standard response for successful HTTP requests. The meaning varies by method (GET returns resource, POST returns result).
Created
The request has been fulfilled and a new resource has been created.
Accepted
The request has been accepted for processing, but processing is not complete.
No Content
The server successfully processed the request but returns no content.
Partial Content
The server is delivering only part of the resource due to a Range header sent by the client.
Moved Permanently
The resource has been permanently moved to a new URL. Search engines transfer ranking to the new URL.
Found
The resource temporarily resides at a different URL. The client should continue using the original URL.
See Other
The response can be found at another URL using a GET request. Often used after POST/PUT.
Not Modified
The resource has not been modified since the version specified by If-Modified-Since or If-None-Match headers.
Temporary Redirect
Like 302, but guarantees that the method and body will not change when the request is reissued.
Permanent Redirect
Like 301, but guarantees that the method and body will not change when the request is reissued.
Bad Request
The server cannot process the request due to a client error (malformed syntax, invalid parameters).
Unauthorized
Authentication is required. The client must authenticate itself to get the requested response.
Forbidden
The server understood the request but refuses to authorise it. Unlike 401, re-authenticating will not help.
Not Found
The requested resource could not be found on the server. The most common error on the web.
Method Not Allowed
The request method is not supported for the resource (e.g., GET on a POST-only endpoint).
Not Acceptable
The server cannot produce a response matching the Accept headers sent by the client.
Request Timeout
The server timed out waiting for the request from the client.
Conflict
The request conflicts with the current state of the server (e.g., duplicate resource).
Gone
The resource is no longer available and will not be available again. Unlike 404, this is permanent.
Payload Too Large
The request body is larger than the server is willing to process.
URI Too Long
The URI requested by the client is longer than the server is willing to interpret.
Unsupported Media Type
The media type of the request data is not supported by the server.
I'm a Teapot
An April Fools joke from 1998 (RFC 2324). The server refuses to brew coffee because it is a teapot.
Unprocessable Entity
The request was well-formed but contains semantic errors (commonly used in REST APIs for validation).
Too Many Requests
The client has sent too many requests in a given time period (rate limiting).
Unavailable For Legal Reasons
The resource is unavailable due to legal demands (censorship, court order).
Internal Server Error
A generic error when the server encounters an unexpected condition.
Not Implemented
The server does not support the functionality required to fulfil the request.
Bad Gateway
The server, acting as a gateway, received an invalid response from the upstream server.
Service Unavailable
The server is currently unable to handle the request due to maintenance or overload.
Gateway Timeout
The server, acting as a gateway, did not receive a timely response from the upstream server.
36 of 36 status codes shown
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